| Name | Region | Date | Route Length (km) | Suppliers |
| APCN 2 | Asia | 2001 | 19153 | NEC, Pirelli |
| Australia-Japan Cable | Pacific | 2001 | 12700 | Tyco, NEC |
| C2C | Asia | 2001 | 17000 | TyCom |
| China-US Cable Network (Northern Route) | Trans-Pacific | 1999 | 12000 | TSSL |
| East Asia Crossing (EAC-1) | Asia | 2002 | 11600 | KDD-SCS |
| HONSHU - HOKKAIDO | Asia | 1993 | 50 | Sumitomo |
| Japan Domestic (Aomore - Hakodate) | Pacific | 1989 | 125 | |
| Japan Domestic (Chikura - Ninomiya) | Pacific | 1989 | 195 | KDD |
| Japan Domestic (Hachinohe - Muroran) | Pacific | 2002 | 280 | NSW, NEC |
| Japan Domestic (Hachinohe - Tomakomai) | Pacific | 1986 | 290 | NEC, OCC |
| Japan Domestic (Hamada - Fukuoka) | Pacific | 1990 | 255 | NEC, OCC |
| Japan Domestic (Kitakyushu - Shimonoseki) | Pacific | 1986 | 10 | |
| Japan Domestic (Matsuyama - Hiroshima) | Pacific | 1987 | 30 | OCC |
| Japan Domestic (Niigata - Sapporo) | Pacific | 1991 | 885 | NEC, OCC |
| Japan Domestic (Tokushima - Wakayama) | Pacific | 1988 | 75 | |
| Japan Domestic -- Japan International Tie Cable | Pacific | 1993 | 1050 | NEC, OCC |
| Japan Information Highway (JIH) -- Chikura - Joetsu | Pacific | 1999 | 4200 | |
| Japan Information Highway (JIH) -- Joetsu - Miyazaki | Pacific | 1999 | 4000 | |
| Japan Information Highway (JIH) -- Miyazaki - Chikura | Pacific | 1999 | 2100 | |
| Japan Telecom's Domestic Network (AKITA - SAKATA) | Asia | 1998 | 150 | |
| Japan Telecom's Domestic Network (ESASHI - AJIGASAWA) | Asia | 1998 | 160 | |
| Japan Telecom's Domestic Network (SAKATA - MURAKAMI) | Asia | 1998 | 140 | |
| Japan Telecom's Domestic Network (TOKUSHIMA - WAKAYAMA) | Asia | 1998 | 60 | |
| Japan-US (JUS) (Makaha-Shima) | Trans-Pacific | 2000 | 21000 | Alcatel, KDD, Fujitsu, NEC |
| Japan-US (JUS) (Shima-Maruyama) | Trans-Pacific | 2000 | 21000 | Alcatel, KDD, Fujitsu, NEC |
| Pacific Crossing - 1 (PC-1) | Trans-Pacific | 2000 | 20800 | TSSL |
| TPC-4 | Trans-Pacific | 1992 | 9850 | AT&T, Simplex, KDD, OCC, NEC, and Fujitsu |
If you find an error in our database, please contact us with your suggested update. We have resolved to keep our database as error-free as possible. We know the frustration of using a spreadsheet only to find that some systems we never built or were included twice in the sheet.
